DS4305, DS4305K

Electronically Programmable Voltage Reference

Nonvolatile Sample and Infinite-Hold Adjustable Voltage Reference for Automated Factory Calibration

Please check latest availability status for a specific part variant.


The DS4305 is a nonvolatile (NV) electronically programmable voltage reference. The reference voltage is programmed in-circuit during factory calibration/programming. Programming the reference voltage, VOUT, is as simple as applying the desired voltage on VIN and toggling the adjust pin (active-low ADJ) to lock the VOUT voltage level indefinitely, even if the device is power cycled. The DS4305 replaces current cumbersome factory adjustment arrangements with a low-cost solution that can be adjusted using automated techniques. In addition, the DS4305 has the ability to be readjusted after the unit has been fully assembled and tested. This results in a much more flexible manufacturing arrangement, lower inventory costs, and a quicker time-to-market.

DS4305, DS4305K: Typical Operating Circuit DS4305, DS4305K: Typical Operating Circuit Enlarge+

Key Features

  • Precise Electronically Adjustable Voltage Reference
  • Enables Automated Factory Trimming of Devices Needing Voltage Adjustment
  • Can be Adjusted to Within ±1.5mV
  • Wide Adjustable Output Voltage Range Within 300mV of the Supply Rails
  • Low Temperature Coefficient
  • ±1mA of Output-Current Drive
  • NV Memory Stores the Voltage Indefinitely
  • Output Short-Circuit Protection
  • Low Cost
  • Low Power Consumption
  • 4.0V to 5.5V Single-Supply Operation
  • Small 5-Lead SOT23 Package
  • -40°C to +125°C Temperature Operation
  • DS4305K Evaluation Kit is Available


  • Bias Adjusting
  • Factory-Calibrated Equipment
  • Offset Nulling
  • Power Amps
  • Power Supply Calibration
  • Pressure Bridges
  • Threshold Setting

See parametric specs for Voltage References (171)

Part NumberVOUT
Temp. Coeff.
Initial Accuracy
(% max)
Calibration MethodISUPPLY
Noise 0.1Hz to 10Hz
Oper. Temp.
max@ +25°CmaxminmaxtypSee Notes
DS4305 Programmable (within 300mV of Rails)240.03E2CRef.200045.5160-40 to +125
$1.00 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Product Reliability Reports: DS4305.pdf 
Request Reliability Report for: DS4305K 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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